Hey Everyone,
I apologize if this question has been asked/answered before but I have been unable to find the solution.
Our problem is gathering Netflow statistics from Cisco Tunnel Interfaces. Physical interfaces are reporting back to Netflow properly - Our problem is only with Tunnel Interfaces. Is anyone aware of any tricks/tips that are necessary for this to work? We have tried different combinations of ip flow ingress/egress/route-cache commands without any luck. When we run the 'show ip flow interface' command we do not see the Tunnel interface listed. Is this a sign that the interface is not gathering statistics? Could this be an IOS version issue? Any assistance would be appreciated!
We have the following setup (simplified) on a Cisco 2811.
Interface Tunnel0
ip flow ingress
ip flow egress
ip route-cache flow
Interface Fa 0/0
ip flow ingress
ip flow egress
ip flow-cache flow
ip flow-export source FastEthernet0/1
ip flow-export version 5
ip flow-export destination (IP Address) 2055
ip flow-top-talkers
*********#show ip flow interface
FastEthernet0/0
ip route-cache flow
ip flow ingress
ip flow egress
*********#show ip flow export
Flow export v5 is enabled for main cache
Export source and destination details :
VRF ID : Default
Source(1) (IP Address) (FastEthernet0/1)
Destination(1) (Server IP Address) (2055)
Version 5 flow records
1374 flows exported in 1230 udp datagrams
0 flows failed due to lack of export packet
3 export packets were sent up to process level
0 export packets were dropped due to no fib
0 export packets were dropped due to adjacency issues
0 export packets were dropped due to fragmentation failures
0 export packets were dropped due to encapsulation fixup failures
Thank You!
